RE:
I also tried the recommendation of loosening and retightening the LM10LUU bearing holders and also loosening the screws on the linear rail and retightening them without much force (snug but not tight). These two things seem to have helped in my case. I can definitely hear an improvement and it's usable now.
I have the X and Y stepper motors on order and will try replacing them when I install the filtration and camera.
RE: Bad Vibrations
fwiw: I had a _little_ of this when I first built the printer... but since I ran the accelerometer calibration, it's significantly worse.
If I recall, factory settings were 60/50hz, and now they're 52/48hz.
RE: Bad Vibrations
Finished my kit build a few days ago and I also have the same issue. Not sure if its coincidence but during assembly I noticed that one of my stepper motors rotated with ease, nice and smooth. The other was much harder to rotate and felt rough and chunky. Same feeling as when bearings start to go bad. This was on the bench with the motors out while installing the pulleys. There's a recent thread on reddit where someone mentioned replacing a stepper being the cure for their resonance. I guess I'll try the fix mentioned above about freeing tension from the linear bearing mount and report back.
RE: Bad Vibrations
I too had this issue following completing my Core One Kit build and was immediately beside myself with the noise. Since then I have been able to eliminate it with some slight guess and check. Resonance is always tricky because its a fine line of what is causing it.
1. I increased my belt tension from ~85Hz to ~87Hz, still within the acceptable range, but in theory should help with vibrations. And it did, the very loud gantry vibrations went away, with a slight linger of them at a much much lower threshold.
2. I tried three different tabletops that the printer sat in. The original was an IKEA desk, and the second two were solid wood desks. The solid wood performed much better. I don't know that there's a preferred density desktop, but who am i to argue with the scientific method...
RE: Bad Vibrations
My issue is almost exactly as described: if I play gcode that runs a diamond at 40mm/s, there's horrible almost rattling resonance coming from the left side of gantry. If I push up on the left linear bearing, it goes away.
Unfortunately, no amount of loosening and tightening of the bolts as described resolves it however, nor has loosening and retightening the linear rail. After speaking with support they're sending me some new linear bearings, so we'll see if that resolves it in my case. The only thing I didn't try was loosening and retightening the 3 bolts attaching the 90 degree brackets to the linear rail, but I'm not sure how that could make any difference.
RE: Bad Vibrations
I received two replacement bearings. Replacing my left side bearing had an immediate improvement, however, when I replaced the right, both got substantially worse. I then played a game of whackamole, trying different tightening orders of the rods and bearing holders. I found that pushing the left side rod in a bit (so it's past flush with the smaller of the two rod holders) improved things greatly and my previously noisy left is now quiet.
However, the noise migrated to the right. Since I was sent two bearings, I replaced the right bearing and it was substantially worse. The bearing is also noticeably grittier and tighter - when it's on the rod, I can only move it up/down, I cannot rotate it around the shaft like I can with the ones that came with the printer. Whereas before I could resolve the noise during tests by pushing up on the bearing, with the new Right bearing, nothing alleviates the noise.
I'll continue doing some trial and error and contact support again tomorrow if I can't resolve.
RE:
Hi,
I had similar noise in my CoreOne, kit version. It was very loud, and indeed, changing the printing speed to 90% or 110% changed the pitch and volume of the noise, but it didn't remove it, and it was still very loud. I contacted support, and they said they would investigate and come back to me once they know more.
This troubled me so much that I had to look more closely myself to see what was causing the issue. I noticed that even when the printer is turned off, when I move the extruder back and forth and side to side, I can easily replicate the vibration. I noticed that the vibration is linked to the XY-carriage / smooth rods, which cause the entire linear rail to vibrate and, in turn, the whole printer to vibrate badly. If I lifted / twisted the linear rail and moved it, the noise was gone. I thought that the issue might be with the LM10LUU linear bearing orientation / tolerance issue.
So, this is what I did next:
..
This solved it for me too, thank you so much! My printer was annoying me so damn much, even on ~80% it was unbearable to use while working next to it and it already stands on a concrete slab and foam.. The vibrations were really, really annoying. It's still not as silent as I would like it to, but you made my life much more enjoyable now. I would never came up this solution. 😀
RE:
I got a replacement set of linear bearing holders (L brackets) and it completely solved the noise for me, both the rattling and harsh resonance. The printer is 10x quieter than before.
I got a proper machinists square (only ~$15 on Amazon) to check - the original L brackets were both maybe 90.5, or 91 degrees; the new ones are exactly 90. During assembly I tried to eyeball the brackets on a countertop corner and obviously didn't see they problem.
I was able to get the printer belts to perfect Hz as well as -0.03 skew on Califlower v2 with the bent brackets; as far as I can tell, they were pushing slightly on the Y rods and these was causing most of the horrible noises.
If you're reading this thread and having this issue, I highly recommend getting a machinists square, take the brackets fully off and checking if they're square.
This has been quite an ordeal for me, replacing first the bearings, then a motor, before finally figuring out it was the brackets.
It's like a whole new printer now, dead quiet compared to before.
RE: Bad Vibrations
I'm trying to solve similar problem. To replace the brackets, did you have to remove core-xy assembly from the printer, disconnect all the wiring, hotend, filament tube, case fans etc? Maybe there's a minimum set of parts that could be removed to do that.
RE:
I'm trying to solve similar problem. To replace the brackets, did you have to remove core-xy assembly from the printer, disconnect all the wiring, hotend, filament tube, case fans etc? Maybe there's a minimum set of parts that could be removed to do that.
Before you do that, try this first. It solved my problem and was easy to do: https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/bad-vibrations/paged/6/#post-754670
RE:
I'm trying to solve similar problem. To replace the brackets, did you have to remove core-xy assembly from the printer, disconnect all the wiring, hotend, filament tube, case fans etc? Maybe there's a minimum set of parts that could be removed to do that.
No, I didn't need to fully take the gantry off or remove much wiring. In fact, it was less work than I thought, and all went pretty smoothly and quickly. It took me longer to get the stupid right side panel back one with the little handle and filament inserter thing than it took me to get the entire extruder off and back on.
I did the following:
- Remove the top acrylic panel, side acrylic panels, side metal panels, and top metal enclosure frame (only 8 screws for that)
- Remove the extruder; Prusa now has their own guide on how to do that; I actually took apart even less than they did, and left the extruder bowden tube connected and didn't disconnect or unplug any electronics other than the part fan, then draped the extruder over the side gently
- Remove the belt-retainer thing from the linear rail and reinsert the green safety retainers from when you assembled the printer that you hopefully kept. From here, you can remove the linear beam and rail
It is then easy to remove, check or replace the brackets, just remove them from the bearing and take off the belt guides.
To make it extra easy on myself, wherever possible, I put the extruder hardware back into the hole it came out of after removing the associated part. Reassembly was quick
RE: Bad Vibrations
This works for me... But, now on the back U axis i have noise on some movement, and filament doesn't stick on some points and that cost really bad first layer.
https://photos.app.goo.gl/oNZvTuoygF4VZvSC7
After is just noise and bad quality:
https://photos.app.goo.gl/PC8GFk4ZQgVWKBMc9
I'm sorry to say this, but I'm starting to really hate CoreOne... for the past three weeks, I've lost the will to print because something always seems off. I've tried three different filament manufacturers, including Prusament. I'm wasting 50% of the material because at least half of it is throwaway. Hours spent trying to solve the problem, not to mention searching for help on chat with wait times of over 40 minutes, even though they say it's 8. I'm just tired of it.
RE: Bad Vibrations
I'm sorry to say this, but I'm starting to really hate CoreOne... for the past three weeks, I've lost the will to print because something always seems off. I've tried three different filament manufacturers, including Prusament. I'm wasting 50% of the material because at least half of it is throwaway. Hours spent trying to solve the problem, not to mention searching for help on chat with wait times of over 40 minutes, even though they say it's 8. I'm just tired of it.
We are basically beta testers. I’m fine with it and half expected it. Took 4 weeks before I consistently had successful prints. Learned a lot in the process. IDK, I probably would have been bored if the printer worked right out of the box. I suppose the one upside is that when the Core One S comes out, I’ll be first in line for the upgrade kit.
RE: Bad Vibrations
The only real issue I had from my factory built core one is the VFA issue. Slowly, that’s been getting better as they’ve been isolating what causes those issues. I’m not gonna lie to you the H2D I also have sorted just works… but unlike Prusa, they want you using all of their stuff and you can’t go any place else to get parts, etc.
I see the core one as getting better and better as they iron out the issues.
RE: Bad Vibrations
😀
😊 Good idea. If I had a lot of free time, I would probably enjoy having something to do with the printer. Meanwhile, I spend hours trying to print important parts. Without success. I'm starting to consider buying a competitor's product and, if it doesn't have such problems, getting rid of the Prusa.
As for upgrades... I've lost interest in upgrades, I dream of a printer that simply prints
Best regards
RE: Bad Vibrations
😀
😊 Good idea. If I had a lot of free time, I would probably enjoy having something to do with the printer. Meanwhile, I spend hours trying to print important parts. Without success. I'm starting to consider buying a competitor's product and, if it doesn't have such problems, getting rid of the Prusa.
As for upgrades... I've lost interest in upgrades, I dream of a printer that simply prints
Best regards
Yep… different use cases. I don’t do a lot of printing, mostly stuff to support my other hobby, astrophotography as well as stuff to use around the house. I guess for me, it wasn’t about the destination but the journey. Built the MK4 from a kit, upgraded to MK4S and now the C1. The MK4S was a great printer. Turned it on and it worked. The C1 nothing but teething pains. I do have it to the point where it’s mostly working… mostly.
RE: Bad Vibrations
That part of the tensioning guide seems new? I actually took the head of by removing:
- left side cover
- material fan
- extruder fan to uncover bolts underneath
- unscrewed back two bolts
- unscrewed the whole head from rail/belt mount (3 bolts under fan) and wire guide mount (2 bolts left of extruder)
- slid the whole assembly up
Turned out way easier that removing side panels that require you to manipulate the printer on its side and lose the rubber feet.
- Remove the extruder; Prusa now has their own guide on how to do that; I actually took apart even less than they did, and left the extruder bowden tube connected and didn't disconnect or unplug any electronics other than the part fan, then draped the extruder over the side gently.
RE: Bad Vibrations
😀
😊 Good idea. If I had a lot of free time, I would probably enjoy having something to do with the printer. Meanwhile, I spend hours trying to print important parts. Without success. I'm starting to consider buying a competitor's product and, if it doesn't have such problems, getting rid of the Prusa.
As for upgrades... I've lost interest in upgrades, I dream of a printer that simply prints
Best regards
I'm the same, Core One has multiple issues (VFA's, vibrations, layer shift), prints fail. I need to print within a specific time frame, and it does not achieve this with a 50% failure rate due to layer shifting. It's just an expensive paperweight now.
Mk3/Mk4 were fantastic, I was expecting the same with the Core One. I have spent hours troubleshooting and with support and I am no further, it has been a waste of time. It seems the solution is to strip it down, replace some parts and it "might" work. I currently don't have time to do this. Mk4S is printing overtime to keep production where it needs to be.
The H2D with AMS Combo is looking more and more attractive to me! But I'm also not 100% confident it will just work, but it also can't be as bad as my Core One... Can it?
RE: Bad Vibrations
Hi Milkie 🙂
I understand you 100%. I also understand that there may be minor faults. Today I used technical support. I checked everything as requested, I was also told to unscrew 6 screws on the strip and turn them in the specified order (as in the upgrade instructions). The matter has been referred to a CoreOne specialist and I may receive parts that I will have to replace. I earn money by working every day. While the upgrade was included in the price, testing and replacements are just a waste of time and money.
I agree that CoreOne is simply a nice, but expensive, paperweight.
Listen to how it sounds now...
https://photos.app.goo.gl/Mjgbp8Z8e5qUDSYZ7
I am increasingly dreaming of a printer that simply prints. I must admit that after talking to friends who use Bambulab printers, I am considering it more and more. Because somewhere along the way, I will eventually lose my loyalty when I encounter challenges that should not exist.
I probably sound annoyed, but I assure you that I am more tired and resigned.
RE: Bad Vibrations
I'm happy for you 🙂 I just want to be able to print. Instead of creating new files, I spend my time solving endless problems with the printer itself. I'm keeping my fingers crossed that all CoreOne printers will finally start working properly. Because apparently there are some that work for other users.